(1) All proceedings pending in the High Court of Assam and Nagaland and in the Courts of the Judicial Commissioners for Manipur and Tripura immediately before the appointed day shall, from such day, stand transferred to the common High Court.
     (2) Every proceeding transferred under sub-section (1) shall be disposed of by the common High Court as if such proceeding was entertained by that High Court.
     (3) Any order made before the appointed day by the High Court of Assam and Nagaland or by the Court of the Judicial Commissioner for Manipur or by the Court of the Judicial Commissioner for Tripura shall, for all purposes, have effect not only as an order of that High Court or, as the case may be, of that Court but also as an order of the common High Court.